AAT2612 Datasheet, PDF (1/18 Pages) Skyworks Solutions Inc. – Step-Down DC/DC Converter With Three High PSRR LDOs

DATA SHEET
AAT2612
Step-Down DC/DC Converter With Three High PSRR LDOs
General Description
Features
The AAT2612 is a multiple rail power management IC. It
integrates a 600mA high-frequency switching-converter
and three 300mA linear regulators. The switching power
supply is a highly-integrated monolithic step-down con-
verter operating at 1.5MHz, achieving high efficiency with
small external components. The three linear regulators
are high PSRR low dropout regulators (LDOs) providing
accurate regulation and excellent transient response.
The step down converter is programmable with external
feedback resistors, and the three LDOs are fixed voltage
outputs of six combinations for 1.8V, 2.8V, 3.0V and 3.3V.
Integrated over-current or over-temperature protection
circuitry becomes active as appropriate, when either fault
occurs, and the AAT2612 recovers automatically when
the fault is removed.
• Current Mode Control DC/DC Converter:
▪ Programmable Output Up to 600mA
▪ 1.5MHz Switching Frequency
▪ Up to 90% Efficiency
▪ Integrated Switching Power FETS
▪ Integrated Compensation Network
▪ Internal Current Limit
•3 Low Dropout Regulators with Separate Enable Pins:
▪ 300mA per Channel
▪ High PSRR
▪ ^{Factory Programmable Output}
•Integrated Soft-Start
•Over-Current Protection
•Over-Thermal Protection
•TQFN33-20 Package
The AAT2612 is available in a Pb-free, thermally enhanced
20-pin TQFN33 package.
Applications
• Cellular Phones
• I/O Power
• Memory Power
• Processor Core Power
• Smart Handheld Devices
Typical Application
2.5V to 5.5V
2.2μF
2.5V to 5.5V
2.2μF
2.5V to 5.5V
4.7μF
INL1
INL2
OUTL1
OUTL2
ENL1
ENL2
ENL3
OUTL3
AAT2612
ENBK
LX
INBK
FB
AGND PGND
2.8 V
300mA
1μF
2.8V
300mA
1μF
1.8V
300mA
1μF
2.2μH
1.2V , 600mA
10μF
R1
59k
R2
59k
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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202407B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 20, 2013